Communications: electrical – Continuously variable indicating – With meter reading
Patent
1998-10-02
2000-09-26
Holloway, III, Edwin C.
Communications: electrical
Continuously variable indicating
With meter reading
455418, 34082531, H04Q 100
Patent
active
061247995
ABSTRACT:
An apparatus and method for locking and unlocking mobile telecommunications handsets or other devices is disclosed. Each handset is unactivated at the time of purchase. Other than emergency calls, or account activation, no calls can be made using the handset unless it has been unlocked. The handset is capable of receiving a readable subscriber identity module (SIM) having a network (or other) ID and a codeword, and its operation is to be locked and unlocked with respect to the entity corresponding to the ID on the SIM. Furthermore, the handset includes a processor programmed with a unique equipment identification number and a key. All handsets manufactured as part of a particular batch may include the key, which is burned or otherwise written into a memory area of the handset so that it may not be read without its being destroyed. The handset processor is also programmed to produce a handset-specific key as a function of the equipment identification number and the batch-specific key. Upon activation of the handset, the customer service center associated with the network operator transmits a modifier to the handset. The handset changes its handset-specific key according to the modifier to yield an operator-specific key. The resulting operator-specific key is used in conjunction with the network (or other) ID (from the SIM) to produce a checkwork. If the checkwork matches the codeword, which is read off the SIM, the handset is unlocked (i.e., enabled) for normal use. Other features of the invention include re-locking the handset according to similar principles, and providing a personal identification number for permanently unlocking the device, so that it can be used with any compatible SIM.
REFERENCES:
patent: 4291197 (1981-09-01), Yonaga
patent: 4736419 (1988-04-01), Roe
patent: 5068889 (1991-11-01), Yamashita
patent: 5159625 (1992-10-01), Zicker
patent: 5199066 (1993-03-01), Logan
patent: 5204902 (1993-04-01), Reeds, III et al.
patent: 5233656 (1993-08-01), Langrand et al.
patent: 5237612 (1993-08-01), Raith
patent: 5257412 (1993-10-01), Tomioka et al.
patent: 5297192 (1994-03-01), Gerszberg
patent: 5386468 (1995-01-01), Akiyama et al.
patent: 5444764 (1995-08-01), Galecki
patent: 5457737 (1995-10-01), Wen
patent: 5572571 (1996-11-01), Shirai
patent: 5600708 (1997-02-01), Mece et al.
patent: 5602536 (1997-02-01), Henderson et al.
patent: 5603084 (1997-02-01), Henry, Jr. et al.
"Cellular-Phone Coverage Expands to 35 Countries," The Wall Street Journal, p. B9 (Nov. 8, 1995).
Brochure entitled "PCS 1900: Tomorrow's Technology-Today," The North American PCS 1900 Action Group (NPAG).
"European Digital Cellular Telecommunications System (Phase 2) Technical Realization of the Short Message Service (SMS) Point to Point (PPP) (GSM 03.40)," European Telecommunication Standard, pp. 1-103 (Oct. 1993).
"European Digital Cellular Telecommunications System (Phase 2) Technical Realization of the Short Message Service (SMS) Point to Point (PPP) (GSM 03.31)," European Telecommunication Standard, pp. 1-24 (Oct. 1993).
BellSouth Intellectual Property Corporation
Ewing, IV James L.
Holloway III Edwin C.
Tocups Nora M.
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